Pseudomyxoma peritonei (PMP) is a rare cancer of the appendix. It usually begins with an adenoma (like a polyp) which grows slowly, spreading along the lining of the abdominal cavity rather than through the lymphatic system or bloodstream. It usually stays within the abdomen and produces a mucus that collects in the peritoneum (abdominal lining) and causes symptoms which may not become apparent for several years.
Symptoms may include:
- A slow increase in waist size
- Hernia (a swelling on the abdomen)
- Loss of appetite
- Unexplained weight gain
- Abdominal or pelvic pain
- Changes in bowel habits